svn commit: r204552 - in head/sys: conf kern net sys
niclas.zeising at gmail.com
Tue Mar 2 10:51:22 UTC 2010
On 2010-03-02 07:58, Alfred Perlstein wrote:
> Author: alfred
> Date: Tue Mar 2 06:58:58 2010
> New Revision: 204552
> URL: http://svn.freebsd.org/changeset/base/204552
> Merge projects/enhanced_coredumps (r204346) into HEAD:
> Enhanced process coredump routines.
> This brings in the following features:
> 1) Limit number of cores per process via the %I coredump formatter.
> if corefilename is set to %N.%I.core AND num_cores = 3, then
> if a process "rpd" cores, then the corefile will be named
> "rpd.0.core", however if it cores again, then the kernel will
> generate "rpd.1.core" until we hit the limit of "num_cores".
> this is useful to get several corefiles, but also prevent filling
> the machine with corefiles.
> 2) Encode machine hostname in core dump name via %H.
> 3) Compress coredumps, useful for embedded platforms with limited space.
> A sysctl kern.compress_user_cores is made available if turned on.
> To enable compressed coredumps, the following config options need to be set:
> options COMPRESS_USER_CORES
> device zlib # brings in the zlib requirements.
> device gzio # brings in the kernel vnode gzip output module.
> 4) Eventhandlers are fired to indicate coredumps in progress.
> 5) The imgact sv_coredump routine has grown a flag to pass in more
> state, currently this is used only for passing a flag down to compress
> the coredump or not.
> Note that the gzio facility can be used for generic output of gzip'd
> streams via vnodes.
> Obtained from: Juniper Networks
> Reviewed by: kan
Can you please document the gernel options and devices in NOTES and
where to change the core filename format somewhere so it doesn't get lost.
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